Thanks Gordon for creating a very nice workshop... I tried it out and it works great... I tried looking for help on how to shoot good night time shots, but unfortunately no one gave a step by step like this workshop. Good stuff

True, but not all DSLRs have MLU, and I've never personally needed it on any of those kind of shots before. But I will mention it in a more advanced workshop in the future - I'm trying to keep these first ones as simple as possible.

he mentioned that above. most DSLRs are programmed to a 30sec shutter, but to get a longer 1 you would need a remote and the camera set to bulb.
And i know it is used for astronomic photography, and i guess it can be used to create different effects. Don't use it so i don't really know.